Combustion performance and emission characteristics on HCCI engine of waste plastic pyrolysis oil biodiesel blends with external PFI and vaporiser

Figures & data

Figure 1. Waste plastics collected.

Figure 2. Pyrolysis equipment.

Figure 3. Photographical view of the experimental setup.

Figure 4. Schematic diagram of the experimental setup.

Figure 5. Schematic diagram of biodiesel fuel vaporiser.

Figure 6. Photo graphical view of ECU.

Table 1. Properties of diesel and waste plastic pyrolysis oil.

S. no.	Properties	Diesel	Waste plastic pyrolysis oil (WPPO)
1	Colour	Orange	Black
2	Specific gravity at 30°C	0.88	0.822
3	Kinematic viscosity at 40°C (cSt)	2.0	2.3
4	Calorific value (kJ/kg)	46300	42100
5	Flash point (°C)	>51	37
6	Fire point (°C)	>55	40
7	Cetane number	55	52

Table 2. Experimental engine specifications.

S. no.	Engine specifications
1	Make	Kirloskar
2	Model	TV1
3	Bore x stroke	87.5 mm x 110 mm
4	Swept volume	661.45 (cc)
5	Connecting rod length	234.00 (mm)
6	Compression ratio	18:1
7	Rate speed	1500 rpm
8	Cooling method	Water

Table 3. Fuel vaporiser specification.

S. no.	Vaporiser specifications
1	Heating capacity	740 W
2	Vaporiser diameter and length	30 mm and 140 mm
3	Warm-up time	6 min
4	Cut-off temperature	160°c
5	Fuel injection pressure	4.0 bar

Figure 7. Variation of cylinder pressure with crank angle.

Figure 8. Variation of rate of heat release with crank angle.

Figure 9. Variation of rate of pressure rise with crank angle.

Figure 10. (a–e) BTE of diesel and waste plastic pyrolysis oil biodiesel HCCI combustion at different load and EGR conditions.

Figure 11. (a–e) EGT of diesel and waste plastic pyrolysis oil biodiesel HCCI combustion at various load and EGR conditions.

Figure 12. (a–e) NO_x emissions of diesel and waste plastic pyrolysis oil biodiesel HCCI combustion at varying load and EGR percentages.

Figure 13. (a–e) CO emissions of diesel and waste plastic pyrolysis oil biodiesel HCCI combustion at varying load and EGR percentages.

Figure 14. (a–e) UHC emissions of diesel and waste plastic pyrolysis oil biodiesel HCCI combustion at different load and EGR percentages.

Figure 15. (a–e) Smoke opacity of diesel and waste plastic pyrolysis oil biodiesel HCCI combustion at different load and EGR conditions.